Fluctuating water consumption and increasingly polluted raw water – these are the market demands to which more and more manufacturers in the process industries need to adjust. The answer is plants based on the “Lego®” principle. Users can add modules or switch them off in line with requirements. But this can be achieved only with modular automation. The automation platform CPX from Festo is the central element in this concept – reflecting the motto “numbering up instead of scaling up“.